Announcing Geometry Expressions 2.0!

Geometry Expressions v2.0 is a major update since v1.1. We have added conics (parabola, ellipse and hyperbola), trace, more CAS support, annotations and more.
Click here to learn more!

Constraint Based Geometry

Geometry Expressions is a constraint based geometry system. The benefits of this type of system are:

Many geometric configurations are much more easily specified using constraints than constructions
It is a much more convenient style for expressing real world problems
This is the approach used in modern Computer Aided Design (CAD) systems

Symbolic Geometry

In Geometry Expressions if you put symbols in as the values of constraints, you get symbolic expressions out for measurements (see above figure). This means:

Reinforcing multiple representations (geometric and algebraic) of the same problem
Symbiosis with CAS (like Maple, Mathematica, Nspire, ClassPad Manager)
Makes the geometry software extremely relevant in algebra, precalculus and calculus courses, as well as in university and professional engineering contexts.

“I am very impressed with Geometry Expressions: dynamic construction and visualization combined with symbolic analysis, all in an easy-to-use graphical user interface. I believe this is precisely the type of intuitive computing that would be well-received by students and a real aid to their understanding of many mathematical topics. ”

Prof Douglas Meade

Department of Mathematics
University of South Carolina, USA

Latest News

We'll be exhibiting at the T Cubed International Conference, Atlanta, March 5-6, 2010. Come see us!
Geometry Expressions v2.1 and Math Illustrations v1.1 just released recently. New features include:
1- Figure Gallery
2- Geometry Atlas
3- Filled circles and ellipses
4- Transparency level setting for filled objects
5- Convenient angle mode switch in the status bar
6- Objects can be arranged by bringing to front or sending to back
7- Toggle Hidden mode makes it easy to show/hide objects
And line rendering is now antialiased on all platforms.
We just got a few new books from the printer titled:
1- Developing Geometry Proofs with Geometry Expressions, written by Irina Lyublinskaya, Valeriy Ryzhik, and Dan Funsch. This book offers 43 interesting geometry problems that resulted from a collaboration of Russian and American educators.
2- 101 Conic Sections Examples using Geometry Expressions, written by Philip Todd. This book shows you what you can do with the conic section capabilities of Geometry Expressions 2.0.
3- Connecting Algebra and Geometry through Technology and Function Transformations. These two books were created by two teachers (Jim Wiechmann and Tim Brown) and are full of activities that they have used successfully in their classrooms!